Transmission method and system for groupcast message and storage medium accessible by electronic devices

Abstract

The present invention relates to a transmission method and system for groupcast message and a storage medium accessible by electronic devices applicable to a first electronic device transmitting a groupcast message to a plurality of remote second electronic devices. The method comprises steps of: acquiring a piece of communication quality information for each said second electronic device and each said piece of communication quality information representing the connection quality between each said second electronic device and nearby devices; the first electronic device selecting one of the plurality of second electronic devices as a broadcast transmitter according to the plurality pieces of communication quality information; the first electronic device transmitting the groupcast message to the broadcast transmitter; and the broadcast transmitter transmitting a broadcast message to the plurality of second electronic devices. Thereby, transmission of a groupcast message to the second electronic devices can be ensured without adding extra transmission cost.

1 . A transmission method for groupcast message, applicable to a first electronic device transmitting a groupcast message to a plurality of second electronic devices, comprising steps of:
 acquiring a piece of communication quality information for each said second electronic device and each said piece of communication quality information representing the connection quality between each said second electronic device and nearby devices;   said first electronic device selecting one of said plurality of second electronic devices as a broadcast transmitter according to said plurality pieces of communication quality information;   said first electronic device transmitting said groupcast message to said broadcast transmitter; and   said broadcast transmitter transmitting a broadcast message according to said received groupcast message to said plurality of second electronic devices.   
     
     
         2 . The transmission method for groupcast message of  claim 1 , wherein said first electronic device selects said second electronic device having the best connection quality as said broadcast transmitter according to said plurality pieces of communication quality information. 
     
     
         3 . The transmission method for groupcast message of  claim 1 , wherein each of said second electronic devices includes a neighboring table, respectively, recording nearby other second electronic devices of said second electronic device; said broadcast message transmitted by said broadcast transmitter includes said neighboring table of said broadcast transmitter; after said second electronic device receives said broadcast message transmitted by said broadcast transmitter, said second electronic device compares its own neighboring table with said neighboring table of said broadcast transmitter; and when its own neighboring table includes said second electronic device not recorded in said neighboring table of said broadcast transmitter, said second electronic device transmits said received broadcast message according to its own neighboring table. 
     
     
         4 . The transmission method for groupcast message of  claim 3 , and further comprising a step of each of said second electronic devices searching nearby other second electronic devices and recording in said neighboring table. 
     
     
         5 . The transmission method for groupcast message of  claim 1 , wherein each of said second electronic devices records the neighboring quantity of the nearby second electronic devices of said second electronic device, respectively; each of said second electronic devices transmits said neighboring quantity, respectively; said first electronic device selects said second electronic device having zero neighboring quantity as another broadcast transmitter according to said neighboring quantities for receiving said groupcast message transmitted by said first electronic device and transmitting said broadcast message. 
     
     
         6 . The transmission method for groupcast message of  claim 1 , wherein each of said second electronic devices records the neighboring quantity of the nearby second electronic devices of said second electronic device, respectively; each of said second electronic devices transmits said neighboring quantity, respectively; said first electronic device selects said second electronic device having the most neighboring quantity as another broadcast transmitter according to said neighboring quantities for receiving said groupcast message transmitted by said first electronic device and transmitting said broadcast message. 
     
     
         7 . The transmission method for groupcast message of  claim 5 , and further comprising a step of assigning one of said plurality of second electronic devices as a relay terminal, each of said second electronic devices transmitting said neighboring quantity to said relay terminal, respectively, and said relay terminal transmitting said neighboring quantities to said first electronic device. 
     
     
         8 . The transmission method for groupcast message of  claim 6 , and further comprising a step of assigning one of said plurality of second electronic devices as a relay terminal, each of said second electronic devices transmitting said neighboring quantity to said relay terminal, respectively, and said relay terminal transmitting said neighboring quantities to said first electronic device. 
     
     
         9 . The transmission method for groupcast message of  claim 1 , and further comprising a step of assigning one of said plurality of second electronic devices as a relay terminal, each of said second electronic devices transmitting said communication quality information to said relay terminal, respectively, and said relay terminal transmitting said plurality pieces of communication quality information to said first electronic device. 
     
     
         10 . The transmission method for groupcast message of  claim 1 , and further comprising a step of defining said plurality of second electronic devices as at least a group. 
     
     
         11 . The transmission method for groupcast message of  claim 1 , wherein said first electronic device and said plurality of second electronic devices transmit information via a medium. 
     
     
         12 . The transmission method for groupcast message of  claim 1 , wherein said communication quality information is a received signal strength indicator or a signal to noise ratio. 
     
     
         13 . A transmission system for groupcast message, applicable to transmitting a groupcast message to a plurality of remote devices, comprising:
 a first electronic device, transmitting said groupcast message; and   a plurality of second electronic devices, each of said second electronic devices including a piece of communication quality information, respectively, representing the connection quality between each of said second electronic devices and nearby devices;   where said first electronic device selects one of said plurality of second electronic devices as a broadcast transmitter according to said plurality pieces of communication quality information; said first electronic device transmits said groupcast message to said broadcast transmitter; and said broadcast transmitter transmits a broadcast message according to said received groupcast message to said plurality of second electronic devices.   
     
     
         14 . The transmission system for groupcast message of  claim 13 , wherein said first electronic device selects said second electronic device having the best connection quality as said broadcast transmitter according to said plurality pieces of communication quality information. 
     
     
         15 . The transmission system for groupcast message of  claim 13 , wherein each of said second electronic devices includes a neighboring table, respectively, recording nearby other second electronic devices of said second electronic device; said broadcast message transmitted by said broadcast transmitter includes said neighboring table of said broadcast transmitter; after said second electronic device receives said broadcast message transmitted by said broadcast transmitter, said second electronic device compares its own neighboring table with said neighboring table of said broadcast transmitter; and when its own neighboring table includes said second electronic device not recorded in said neighboring table of said broadcast transmitter, said second electronic device transmits said received broadcast message according to its own neighboring table. 
     
     
         16 . The transmission system for groupcast message of  claim 15 , wherein each of said second electronic devices searches nearby other second electronic devices and records in said neighboring table. 
     
     
         17 . The transmission system for groupcast message of  claim 13 , wherein each of said second electronic devices records the neighboring quantity of the nearby second electronic devices of said second electronic device, respectively; each of said second electronic devices transmits said neighboring quantity, respectively; said first electronic device selects said second electronic device having zero neighboring quantity as another broadcast transmitter according to said neighboring quantities for receiving said groupcast message transmitted by said first electronic device and transmitting said broadcast message. 
     
     
         18 . The transmission system for groupcast message of  claim 13 , wherein each of said second electronic devices records the neighboring quantity of the nearby second electronic devices of said second electronic device, respectively; each of said second electronic devices transmits said neighboring quantity, respectively; said first electronic device selects said second electronic device having the most neighboring quantity as another broadcast transmitter according to said neighboring quantities for receiving said groupcast message transmitted by said first electronic device and transmitting said broadcast message. 
     
     
         19 . The transmission system for groupcast message of  claim 15 , wherein one of said plurality of second electronic devices is a relay terminal; each of said second electronic devices transmits said neighboring quantity to said relay terminal, respectively; and said relay terminal transmits said neighboring quantities to said first electronic device. 
     
     
         20 . The transmission system for groupcast message of  claim 16 , wherein one of said plurality of second electronic devices is a relay terminal; each of said second electronic devices transmits said neighboring quantity to said relay terminal, respectively; and said relay terminal transmits said neighboring quantities to said first electronic device. 
     
     
         21 . The transmission system for groupcast message of  claim 13 , wherein one of said plurality of second electronic devices is a relay terminal; each of said second electronic devices transmits said communication quality information to said relay terminal, respectively; and said relay terminal transmits said plurality pieces of communication quality information to said first electronic device. 
     
     
         22 . The transmission system for groupcast message of  claim 13 , wherein said plurality of second electronic devices form at least a group. 
     
     
         23 . The transmission system for groupcast message of  claim 13 , wherein said first electronic device and said plurality of second electronic devices transmit information via a medium. 
     
     
         24 . The transmission system for groupcast message of  claim 13 , wherein said communication quality information is a received signal strength indicator or a signal to noise ratio. 
     
     
         25 . A tangible storage medium accessible by electronic devices, storing a non-transitory program, used for executing a transmission method for groupcast message applicable to a first electronic device transmitting a groupcast message to a plurality of second electronic devices, and said method comprising steps of:
 acquiring a piece of communication quality information for each said second electronic device and each said piece of communication quality information representing the connection quality between each said second electronic device and nearby devices;   said first electronic device selecting one of said plurality of second electronic devices as a broadcast transmitter according to said plurality pieces of communication quality information;   said first electronic device transmitting said groupcast message to said broadcast transmitter; and   said broadcast transmitter transmitting a broadcast message according to said received groupcast message to said plurality of second electronic devices.   
     
     
         26 . The tangible storage medium accessible by electronic devices storing a non-transitory program of  claim 25 , wherein said first electronic device selects said second electronic device having the best connection quality as said broadcast transmitter according to said plurality pieces of communication quality information. 
     
     
         27 . The tangible storage medium accessible by electronic devices storing a non-transitory program of  claim 25 , wherein each of said second electronic devices includes a neighboring table, respectively, recording nearby other second electronic devices of said second electronic device; said broadcast message transmitted by said broadcast transmitter includes said neighboring table of said broadcast transmitter; after said second electronic device receives said broadcast message transmitted by said broadcast transmitter, said second electronic device compares its own neighboring table with said neighboring table of said broadcast transmitter; and when its own neighboring table includes said second electronic device not recorded in said neighboring table of said broadcast transmitter, said second electronic device transmits said received broadcast message according to its own neighboring table. 
     
     
         28 . The tangible storage medium accessible by electronic devices storing a non-transitory program of  claim 27 , and further comprising a step of each of said second electronic devices searching nearby other second electronic devices and recording in said neighboring table. 
     
     
         29 . The tangible storage medium accessible by electronic devices storing a non-transitory program of  claim 25 , wherein each of said second electronic devices records the neighboring quantity of the nearby second electronic devices of said second electronic device, respectively; each of said second electronic devices transmits said neighboring quantity, respectively; said first electronic device selects said second electronic device having zero neighboring quantity as another broadcast transmitter according to said neighboring quantities for receiving said groupcast message transmitted by said first electronic device and transmitting said broadcast message. 
     
     
         30 . The tangible storage medium accessible by electronic devices storing a non-transitory program of  claim 25 , wherein each of said second electronic devices records the neighboring quantity of the nearby second electronic devices of said second electronic device, respectively; each of said second electronic devices transmits said neighboring quantity, respectively; said first electronic device selects said second electronic device having the most neighboring quantity as another broadcast transmitter according to said neighboring quantities for receiving said groupcast message transmitted by said first electronic device and transmitting said broadcast message. 
     
     
         31 . The tangible storage medium accessible by electronic devices storing a non-transitory program of  claim 29 , and further comprising a step of assigning one of said plurality of second electronic devices as a relay terminal, each of said second electronic devices transmitting said neighboring quantity to said relay terminal, respectively, and said relay terminal transmitting said neighboring quantities to said first electronic device. 
     
     
         32 . The tangible storage medium accessible by electronic devices storing a non-transitory program of  claim 30 , and further comprising a step of assigning one of said plurality of second electronic devices as a relay terminal, each of said second electronic devices transmitting said neighboring quantity to said relay terminal, respectively, and said relay terminal transmitting said neighboring quantities to said first electronic device. 
     
     
         33 . The tangible storage medium accessible by electronic devices storing a non-transitory program of  claim 25 , and further comprising a step of assigning one of said plurality of second electronic devices as a relay terminal, each of said second electronic devices transmitting said communication quality information to said relay terminal, respectively, and said relay terminal transmitting said plurality pieces of communication quality information to said first electronic device. 
     
     
         34 . The tangible storage medium accessible by electronic devices storing a non-transitory program of  claim 25 , and further comprising a step of defining said plurality of second electronic devices as at least a group. 
     
     
         35 . The tangible storage medium accessible by electronic devices storing a non-transitory program of  claim 25 , wherein said first electronic device and said plurality of second electronic devices transmit information via a medium. 
     
     
         36 . The tangible storage medium accessible by electronic devices storing a non-transitory program of  claim 25 , wherein said communication quality information is a received signal strength indicator or a signal to noise ratio.